this is an assignment, the radio and tv environment much like the search engine environment. where competition is a click away. it wasn't a mouse click back and. you have to click the dial on your television set. competition was always a click away. there was no cost to switch and you didn't have to pay to switch. so it was easy to switch into situations and you might say how could the exercise market power. the answer is that you exercise market power to the volume and intensity of advertising. advertising is how you make money, and the value of advertising is how you boost how much money you can make. the easiest is to start i think there's a lot of discussion about whether google has market power in the advertising market. that's an interesting discussion. that's not the place to start. the place to start is in search engines, and we think company with a great successful product of my tech company of market power? if they did have market power, how would they go about exercising at? and the answer is they would have more advertising. they would have more ads and because it